Not to be selfish, but i always put my own happiness over those of other one's. I personally think i'm actually able to help a lot of other people out. But does it make me happier? To a certain extent, yes. But not if i spend my entire life trying to help others, while forgetting about myself. It sounds egocentric, and it actually is, but you are the only person that matters. And if you'd like to help someone, your only reason in the end is to make yourself feel better (but you can feel better because the other person feels better, don't forget that).